Piston xod  packing



(No Model.)

H. @.jHUNT. l PIsToN D PACKING. Y 'N'o. 283,711.- (1 Patented Aug. 21, 1883'.

UNITED STATES PATENT OFFICE.

HENRY C. HU'I, QF NEWARK, NEX-V JERSEY.

,PlSTON-ROD PACKING.

SPECIFICATIDN forming part of Letters Patent No. 283,711, dated August 21, 1883.

Application filed February 2l, 1883. (No model.)

-To sal whom. it may concern:

Be it known that I, HENRY C. HUNT, a citizen of the United States, residing at Newark,

i in the county of Essex and State of New Jerrod packings which are composed, principally, 1

of right-angular metallic rings adapted tobe compressed' by steam, to cause said rings to hug the rod.

rEhe object oi' the invention is to more cffectually prevent the escape of steam from the cylinder, to more perfectly adapt the packing to a rod which is out of "line, uto equalize the of the several rings therein.

wear on the packing, and yet to retain all the durability of other metallic packings.

The invention consists in the arrangements and combinations of parts, substantially as will be hereinafter set forth, and iinally embodied` in the claims. l

Referring to the accompanying drawings, in which similar letters of reference indicate like parts in each of the several ligureS, Figure l is a vertical longitudinal section of a cylinder stuiiing-box, showing the arrangement Fig. 2 is a side elevation ofthe packing-rings detached from the rod and box; and Fig. 3 is a section of the same, taken through linea".

In said drawings, a is a stuffing-box, which `is formed upon the cylinder in the usual manner.

b is the follower or gland, adapted to cover the projecting end of said box, suitable meanssuch as the screw-studs and -nuts--being provided to hold said follower or gland in position.

Within the stuiiing-box are arranged a series of rings, c c c, whichengage with the rod, and around which are arranged rings-such as d ewhich coverthe joints between the said rings c. Three sets of rings are preferably arranged together, the edges of which are all square cut or right angular, as shown, so that any endpressure will not tend to separate the rings c d enfrom one another, while at the same time the i joints may be readily made steam-tight without the exercise of peculiar skill. All the rings thus described are rendered compressible by being split longitudinally, as shown in Figs. 2 and 3. I prefer to make the outer ring, e, of drawn-bra ss tubingto facilitate and cheapen the production of the packing, which ring,

formed of a section of tubing, is cut longitudinally, as shown. The peculiar nature of the tubular sheet of brass (or similar elastic and non-corrosive metal) provides sufiicient elasticity to allow the said ring to be sprung over the piston-rod and then return to about its normalposition,after which it may be arrangedlto cover the soft-metal sections, binding the same together. The Babbitt met-al and `leadheretofore used in outer rings are inelastic, and are'therefore not adapted for this purpose. l

' 4Between the outer compressible ring, e, and the wall of the stuffing-box is formed an annular steam-chamber, vwhich is bounded on one sideby the interior wall of the stuffing-box and on the opposite side by the outerv side or periphery of the said outer ring, to which chamber the steam has direct access by means of steam passages or holes h., formed in the partition which separates the cylinder from the smiling-box, or by means of the usual aperture around the rod. ing through the said steam-passages, bears directly upon opposite sides of the said outer ring, so that the impact of the steam is felt on all sides at the same time, whereby the wear on the rings is more evenly distributed and the durability of the packing increased.

I am aware that heretofore right-angular packing frings, with an overlapping outer ring, have been arranged in and covered by an interior boX provided with perforations 011 one side, the steam being adapted to pass therethrough, and by first engaging with one side of the ring', causing it to bear with an unequal strain against the rod. In my device the rings receive an `equal compression on all sides at each impact of the steam, as above set forth.

I may, if I so desire, unite the rings by pins or screws n, whereby the rings are held together firmly and without changing their relations to one another, while at the same time the rings are allowed to ret'ain their elasticity.

The steam, after pass- IOO The rings, when placed together, do not or and the latter of which is of a diamter equal may not completely fill the stuffing-box, the to that of the bore of the stuffing-box.

remaining space at the ends of the packingrings being filled up by end rings, r r', which engage with the said packing-rings c d e, cov. ing the joints between the same.

The ring r is equal in diameter to the bore of the stuffingfbox, forming a steam-tight joint therewith, either by grinding the parts together or by filling or' covering said joint by suitable packing, as y. p

The outer faces of the rings o* r may be madev to conform to the gland.

The partition separating the box and cylinder is perforated, preferably when the packing-rings completely fill the box; but When the end Yrings are used and the steam enters the chamber through the rod-aperture grooves or passages p are formed in the end ring r for the same purpose,

If found desirable, springs may coact with J the steam or act in substitution thereof to hold th packing-rings into engagement with the ro Having thus described my invention, what I claim as new isy l. The combination, with a series of rightangular soft metallic packing-rings, of an over" lapping split metallic ring of drawn-brass tubing, substantially as herein set forth.

2. lhe combination, with a series of right-angular packing-rings, the joints of which are broken by an overlapping split packing ring or rings, of end rings, r r, the former of which is provided with steam-passages adapted to allow the steam to enter the steam-chamber,

3. The combination, with thebox and gland, of right-angular packingrings, the joints between which are covered or broken by an outer split packing ring or rings, which latter is or are surrounded by an annular chamber arranged in relation to the steam passage or passages in the cylinder-partition to allow the steam from the cylinder to act on the outer and opposite sides of the last said ring or rings simultaneously and with equal pressure, substantially as herein set forth.

4. In a steam-packing adapted to be placed in a stuffing-box, the combination, with a single ring, as e, cut lengthwise, and concentric rings similarly cut, having right-angled joints, and secured to said single ring by pins or screws, as n, of end rings, as r r', either beveled or straight, the end ring next to the head of the box`having grooves therein, all substantially as set forth.

'5. In combination, the yright-angular split packing-rings having a steam-chamber between them and the stuffing-box, the end ring r', the packing g, the follower, and said stuffing-box, all said parts being arranged and 0perating substantially as set forth.

In testimony that I claim the'forcgoing I have hereunto set my hand this 11th day of January, 1883.

HENRY o. HUNT.

Witnesses:

CHARLEs H. PELL, F. F. CAMPBELL. 

